Acquiring satisfactory and usable images with a camera involves ensuring that the film or digital sensor in a camera is properly exposed given a scene’s illumination strength and color. Several camera parameters affect this process. To properly handle variations of lighting strength a camera’s exposure can be adjusted by varying three parameters: exposure time, aperture size, and film or sensor...

We propose the application of light field cameras and depth-selective 4-D IIR filtering to enable video surveillance, leveraging the post-capture depth-selective filtering enabled by computational photography. Novel ultralowcomplexity differential-form depth-selective 4-D IIR filter algorithms and their corresponding architectures are proposed for processing 4-D light fields. Practical results ...

Light transport has been analyzed extensively, in both the primal domain and the frequency domain; the latter provides intuition of effects introduced by free space propagation and by optical elements, and allows for optimal designs of computational cameras for tailored, efficient information capture. Here, we relax the common assumption that the speed of light is infinite and analyze free spac...

Light Source Qi Zhao1 and Yan Qiu Chen2, ∗ 1School of Information Science and Engineering, Fudan University, Shanghai, China 2School of Computer Science, Fudan University, Shanghai, China Abstract Camera synchronization is necessary for multi-camera applications. In this paper, we propose a simple and yet effective approach termed Random On-Off Light Source (ROOLS ) to synchronize video sequenc...

Gathering depth information through an endoscope or laparoscope during surgical or other procedures is quite difficult. There are stereo laparoscopes but generating three-dimensional models with them is very difficult. Accurate real-time generation of three-dimensional models through a laparoscope is a needed technology to enable a wide range of surgical applications. We have designed a miniatu...

Spray flows are typically highly unsteady, three-dimensional and often densely saturated with droplets that impact other droplets, coalesce and breakup. Droplets, fluid ligaments and bags can form from fluid streams and sheets being accelerated in air cross flows or along solid surfaces. This work shows the potential for imaging these complex features with novel three-dimensional imaging method...